Limpkin's blog - Tag - nfc - CommentsAn electronics geek blog, dedicated to sharing and open source2018-10-26T09:16:16+01:00Mathieuurn:md5:51de6a3d917257edeff5a252fe925b02Dotclear[ping] Trying to Make a Tiny NFC Reader with a TRF7970A - Anonymous blogurn:md5:64f05530b90f8c11db3ec2aeddcc4fd12015-12-02T00:25:25+01:002015-12-02T00:25:25+01:00Anonymous blog<p><a href="http://www.scoop.it/t/pmclab/p/4056121847/2015/12/02/make-a-tiny-nfc-reader-with-a-trf7970a">Make a Tiny NFC Reader with a TRF7970A | PMClab...</a></p> <!-- TB -->
<p>(&#8230;)</p>Trying to Make a Tiny NFC Reader with a TRF7970A - limpkinurn:md5:dd7e6aeabc83fe7ff9e313c0d777fc7d2015-01-22T21:07:43+01:002015-01-22T21:09:27+01:00limpkin<p>@<a href="https://www.limpkin.fr/index.php?post/2014/12/17/Trying-to-Make-a-Tiny-NFC-Reader-with-a-TRF7970A#c2883" rel="nofollow">Fred Murphy</a>&nbsp;: Hey Fred! Glad you got somewhere... Actually one of my website followers may know why I'm encoutering this problem: because the TRF isn't powered at 3.3V! I'll keep you updated...&nbsp;</p>Trying to Make a Tiny NFC Reader with a TRF7970A - Fred Murphyurn:md5:092cb99b78d0c2d0f6ee22f6b6748c202015-01-21T14:06:53+01:002015-01-22T21:07:29+01:00Fred Murphy<p>A shame to see you abandon this, but I can see why. I've been working on a similar project and was really inspired by your coil antenna work.</p>
<p>I started with the simplest route of using a TI MSP430F5529 dev board and TRF7970A booster pack with a DLP-FANT antenna and can successfully read my xNT tag. I definitely came across problems with TI's demo code, but eventually got it to work. There were definitely some potential issues with SPI comms but to be honest I'm not sure exactly what got it working properly in the end.</p>
<p>I've written it up here: <a href="http://0xfred.wordpress.com/2015/01/14/nfc-login-version-1-0/" title="http://0xfred.wordpress.com/2015/01/14/nfc-login-version-1-0/" rel="nofollow">http://0xfred.wordpress.com/2015/01...</a><br />
I'll upload source code, etc. when I get a chance. I'm currently working on a custom PCB for it. Anything built with a dev board isn't really finished.</p>Trying to Make a Tiny NFC Reader with a TRF7970A - limpkinurn:md5:17a2e2cb8f3de29983cac9ce22be53312015-01-16T21:16:32+01:002015-01-16T21:17:09+01:00limpkin<p>@<a href="https://www.limpkin.fr/index.php?post/2014/12/17/Trying-to-Make-a-Tiny-NFC-Reader-with-a-TRF7970A#c2868" rel="nofollow">César Gaspar</a>&nbsp;: Thanks César! I sent you an email</p>Trying to Make a Tiny NFC Reader with a TRF7970A - limpkinurn:md5:597732f9666d3fd2116fc4864d7fcf432015-01-16T21:16:06+01:002015-01-16T21:17:09+01:00limpkin<p>@<a href="https://www.limpkin.fr/index.php?post/2014/12/17/Trying-to-Make-a-Tiny-NFC-Reader-with-a-TRF7970A#c2872" rel="nofollow">nessuno</a>&nbsp;: It actually was one of my sources... but I didn't get anywhere</p>Trying to Make a Tiny NFC Reader with a TRF7970A - limpkinurn:md5:13d1f1130eed2d5ea45837078f4282b02015-01-16T21:15:38+01:002015-01-16T21:17:09+01:00limpkin<p>@<a href="https://www.limpkin.fr/index.php?post/2014/12/17/Trying-to-Make-a-Tiny-NFC-Reader-with-a-TRF7970A#c2873" rel="nofollow">Jean-Philippe Rey</a>&nbsp;: Hello Jean-Philippe! Actually I didn't even get to try it...</p>Trying to Make a Tiny NFC Reader with a TRF7970A - Jean-Philippe Reyurn:md5:10d079bbb312ace070b31c16841bbb052015-01-13T09:27:25+01:002015-01-16T21:17:10+01:00Jean-Philippe Rey<p>Hi,</p>
<p>Did you manage to get the capacitive sensing work? Is the detection distance big enough to detect an approaching tag/hand?</p>Trying to Make a Tiny NFC Reader with a TRF7970A - nessunourn:md5:63541cd461723871d32b4bfe8697c2252015-01-13T08:40:57+01:002015-01-16T21:17:10+01:00nessuno<p>Try to search HydraNFC, it's a good project that use a TRF7970A.</p>Trying to Make a Tiny NFC Reader with a TRF7970A - onsiminiurn:md5:580c804f9c777a320709fdee26ab5a382015-01-13T04:16:21+01:002015-01-16T21:17:10+01:00onsimini<p>i m interresting in ur project</p>Trying to Make a Tiny NFC Reader with a TRF7970A - César Gasparurn:md5:7360263e325b32e028be96e5dad833aa2015-01-12T01:32:05+01:002015-01-16T21:17:10+01:00César Gaspar<p>Hi,<br />
it is with sadness that I see you to abandon the project. I had seen their previous posts and was eager to see the final result because I'm also developing a similar project with the trf7970.<br />
I'm developing a rfid and nfc reader for an access control system in wireless sensor network for my master's thesis.<br />
I am interested in your offer. I will be happy to receive it because I use it all the texas instruments samples and other</p>Using a Standard Coil for NFC Tag Implant Reading - limpkinurn:md5:dfd8caeaf1295cbde6d0f934ecb1870d2014-10-08T17:06:47+02:002014-10-08T16:08:06+02:00limpkin<p>@<a href="https://www.limpkin.fr/index.php?post/2014/10/07/Using-a-Standard-Coil-for-NFC-Tag-Implant-Reading#c2542" rel="nofollow">Przemo-c</a>&nbsp;: well, the current pcb is 35x45mm &nbsp;and has expansion capabilities <img src="/themes/default/smilies/wink.png" alt=";)" class="smiley" /></p>Using a Standard Coil for NFC Tag Implant Reading - limpkinurn:md5:92828d956873100f7f0b809513d44f2a2014-10-08T17:05:34+02:002014-10-08T16:05:58+02:00limpkin<p>@<a href="https://www.limpkin.fr/index.php?post/2014/10/07/Using-a-Standard-Coil-for-NFC-Tag-Implant-Reading#c2541" rel="nofollow">Jean-Philippe Rey</a>&nbsp;: Merci beaucoup! Pas de soucis, je t'envoies un email...</p>Using a Standard Coil for NFC Tag Implant Reading - Przemo-curn:md5:c0099b4f4e0715972928a384d622314b2014-10-08T10:43:15+02:002014-10-08T16:04:10+02:00Przemo-c<p>That's a great project. I also have xNT implanted and found modules with smaller antenna are better for reading the implant (for instance ACR122T) than trying to find sweetspots in larger antenna.</p>
<p>Would be great if it was possible if thanks to this project you could shrink nfc reader or just antenna components and their tuning for them to be connected to the rest of the reader/microcontroler via wire.</p>
<p>ps. Hope it will be available for purchase at some point.</p>
<p>I'll be definetly following this project.</p>Using a Standard Coil for NFC Tag Implant Reading - Jean-Philippe Reyurn:md5:3925e6b607e8837e790881ad29c5fe912014-10-08T10:42:34+02:002014-10-08T16:04:10+02:00Jean-Philippe Rey<p>Hello hello,</p>
<p>Très chouette article! (Merci de l'avoir posté sur hackaday, sinon je ne serais pas tombé dessus).</p>
<p>Apparemment tu as réussi à trouver quelqu'un pour réaliser l'implantation en Suisse. Est-il possible d'obtenir l'adresse?</p>